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Confirm whether it is due to process operation. The fluid does indeed pulsate. At this time, the flow meter only reflects the flow conditions truthfully. The fault can be eliminated by itself after the pulsation ends. Electromagnetic interference caused by external stray currents, etc., check whether there are large electrical appliances or welding machines in the operating environment of the instrument. Make sure that the instrument is well grounded and the operating environment is good, and the pipeline is not filled with liquid or in liquid. When there are bubbles, both are caused by process reasons. At this time, you can ask the process personnel to confirm. After the liquid pipe is full or the bubbles calm down, the output value can return to normal. The transmitter circuit board is a plug-in structure. Due to the large vibration of the on-site measurement pipe or liquid, the power board of the flow meter will often become loose. If it becomes loose, the flow meter can be disassembled and the circuit board re-fixed. The piston of the electromagnetic flowmeter is stuck. There are many reasons for this failure. The positioning pin on the piston of the electromagnetic flowmeter is loose, the pin in the center of the upper and lower connecting rods is loose, the connection between the piston and the connecting rod is loose, and poor oil quality may cause the piston to get stuck. The solution is:: Disassemble the flow meter, retighten the loose parts, assemble them, and replace the damaged parts. If the piston and cylinder liner are corroded, carefully polish them with fine sandpaper to remove the rust, and finally reassemble them. 1. The cause of the failure of electromagnetic flowmeter output shaking. Output shaking can generally be summarized into five causes of failure. 1. The flow itself fluctuates or pulsates, which is not essentially a fault of the electromagnetic flowmeter. It only truthfully reflects the flow conditions. 2. The pipe is not filled with liquid or the liquid contains bubbles. 3. Electrical and magnetic interference such as external stray current. 4. Causes in terms of liquid physical properties (such as uneven conductivity of the liquid or slurry containing more variable particles/fibers, etc.). 5. The electrode material of the intelligent electromagnetic flowmeter does not match the liquid properly. 2. Inspection procedures for electromagnetic flowmeter output shaking. To check the electromagnetic flowmeter output oscillation process, first make a preliminary investigation and judgment based on the process, and then conduct detailed inspections and troubleshooting one by one. The principle of the order of inspection listed in the process is. 1. It can be understood through observation or inquiry that the ones that do not require major operations come first, that is, easy first and then difficult. 2. According to past on-site maintenance experience, the one with higher frequency of occurrence and higher probability of occurrence in the future comes first. 3. The order of inspection itself requires that if the last few fault causes are confirmed through preliminary investigation, detailed inspection can be carried out in advance. 3. Solution to electromagnetic flowmeter output shaking. 1. The impact of external electrical and magnetic interference on the signal converter. There are many interference sources, including power interference (50hz power frequency interference), electromagnetic interference caused by motors, common mode interference superimposed on the signal by the integrated electromagnetic flow meter, etc. From the perspective of the way interference is introduced into the signal converter, the main sources are power supply circuits and signal circuits. The converter can generally return to normal when the interference source disappears. 2. The influence of external interference on the sensor electrode. When there is stray current in the sensor, the ionosphere is attached to the electrode, or there is a large amount of interference signal on the signal line due to on-site grounding problems, the signal processing circuit will not be able to obtain the actual signal from the noise. When the liquid is a slurry containing more variable particles, and the particles in the measured liquid wash away the electrode, a large number of spike interference signals will appear in the signal. The signal processing circuit will also be unable to obtain the actual signal from the noise. 3. The sensor is not full or the liquid contains bubbles. If an electrode is not in contact with the measured liquid due to the above reasons, the signal on the electrode will be a messy signal. For more information, please visit the company’s official website http://www.yb1518.com/. Please keep this link when reprinting! http://www.yb1518.com/UploadFiles/2012717174126829.jpg